squally vs tempestuous

squally

adj
  • Characterized by squalls, or sudden violent bursts of wind; gusty. 

  • Not equally good throughout; not uniform; uneven; faulty. 

  • Producing or characteristic of loud wails. 

tempestuous

adj
  • Of, or resembling, a tempest; stormy, tumultuous. 

How often have the words squally and tempestuous occurred in a corpus of books? (source: Google Ngram Viewer )